every time i shut down the computer, there must be some error messages like xxxdll file is missing or corrupted. but i can use the PC normally, anyone could tell me is there any problem of my computer? can i neglect these erorrs?
have you recently uninstalled some app(s) on your computer? If so, please try reinstalling it/them.
Fix the potential registry errors using a professional reg cleaner.
restore or reinstall your system (not recommended - at least please move your personal info to other non-system disks firstly)